| 摘要 |
A water jacket (21) is split in two by a flat-plate-shaped partition wall (23) to form a first water jacket section (24) at a cylinder-head side, and a second water jacket section (25) at a cylinder-block side. The partition wall (23) is connected to a section of a combustion chamber (5) at the side of one side surface of the internal combustion engine (1), said section connecting an exhaust port wall (7) and the top wall (12) of the combustion chamber (5). The partition wall (23) is also connected to a section at the side of another side surface of the internal combustion engine (1), said section forming a side wall of the combustion chamber (5) at an upper end side of a cylinder wall (16). Furthermore, the partition wall (23) is obliquely slanted such that an exhaust-port side is positioned further towards the cylinder-head side than an air-intake-port side. |
